Despite entering their first-ever continental adventure, Oliver Glasner's side are learning at a rapid pace. Missing star players like striker Jean-Philippe Mateta and defender Daniel Muñoz, the London club left Dublin with a comfortable win that all but guarantees them a spot in the Europa Conference League qualifying rounds.
A further victory in their upcoming match against Finland's KuPS ought to be sufficient to secure direct passage to the knockout stages, particularly after a previous stumble against Strasbourg.
This match offered a chance for some of Palace's fringe players to shine. Christantus Uche, making only his second start since joining on loan from Getafe, opened the account with a clinical finish. Striker Eddie Nketiah added a second, finding the net for the second game in match.
The Shelbourne team that had finished their domestic season were no match against a largely second-string Palace lineup. The visitors were already weakened by the reports that Mateta and Muñoz are sidelined with knee problems.
Despite torrential rain in Dublin, Palace quickly established dominance. A slick move in the 11th minute, initiated by Daichi Kamada's clever pass, allowed Nketiah to lay on Uche for a straightforward tap-in.
Youngster Adam Wharton went close minutes later, driving a long-range shot over the bar. Nketiah then appealed for a penalty after racing into the area, but the official dismissed the appeals.
The formerArsenal striker didn't need to wait long to find his goal, tapping home from close range after Uche's effort had struck the post.
The home side were clinging on desperately. Defender Kameron Ledwidge was lucky to escape a booking for a couple of agricultural tackles on Yeremy Pino, before Chris Richards rattled the crossbar with a header from a corner.
The contest was as good as over eight minutes from half-time. Yeremy Pino meandered past a series of comically weak challenges before coolly slotting a shot past goalkeeper Wessel Speel to extend the lead to 3-0.
Following the break, manager Oliver Glasner seized the opportunity to withdraw several individuals like Kamada and Wharton. Substitute Romain Esse almost scoring with his very first touch, only to see his shot blocked.
The youngster was incredibly unlucky later on, seeing one shot strike off both posts before being gathered on the line. Uche then missed a sitter of a chance, showing there is still room for development in his game.
The only concern for Palace was a second-half injury to Justin Devenny, who was forced off. This allowed 17-year-old striker Benji Casey to earn his first-team debut, capping an otherwise positive night for the traveling side.
Elara Vance is a UK-based astrophysicist and science communicator with over a decade of experience writing about space and technology.